Agreed, but I find for even these simple tasks it's hit-and-miss for accuracy. My Google device will randomly not know what a "shopping list" is, or the interactions go something like this:
"Hey Google, put dishwasher salt on the shopping list"
"OK, I added 'put dishwasher salt'"
(strangely, this particular bug only manifests for dishwasher salt).
Timers are useful, but sometimes they can't be shut off by voice command.
I used to work in aerospace. One of my projects involved running avionics bench tests at a customer facility, basically the avionic subsystem of the aircraft in a big room on shelves. We were using a laptop for data logging and started getting dropouts in the data every 5 minutes. This was worrying because a) this hadn't happened at our site on similar equipment and b) this was a final customer-facing check before doing a real test flight.
We spent about a week trying to debug the system and the software and at a certain point while I was just sitting and thinking about what to do next, Flying Toasters popped up in the data logging PC (the lid was normally closed because of the space on the bench).
The Windows screensaver was hogging so much CPU that the datalogger couldn't keep up.